/**
 * Copyright 2013 Joan Zapata
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.tang.campusyc.adapter;

import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.text.util.Linkify;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RatingBar;
import android.widget.TextView;

import com.squareup.picasso.Picasso;
import com.squareup.picasso.RequestCreator;

/**
 * Allows an abstraction of the ViewHolder pattern.<br>
 * <br>
 * <p/>
 * <b>Usage</b>
 * <p/>
 * 
 * <pre>
 * return BaseAdapterHelper.get(context, convertView, parent, R.layout.item)
 * 		.setText(R.id.tvName, contact.getName())
 * 		.setText(R.id.tvEmails, contact.getEmails().toString())
 * 		.setText(R.id.tvNumbers, contact.getNumbers().toString()).getView();
 * </pre>
 */
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class BaseAdapterHelper {

	/** Views indexed with their IDs */
	private final SparseArray<View> views;

	private final Context context;

	private int position;

	private View convertView;

	private BaseAdapterHelper(Context context, ViewGroup parent, int layoutId,
			int position) {
		this.context = context;
		this.position = position;
		this.views = new SparseArray<View>();
		convertView = LayoutInflater.from(context) //
				.inflate(layoutId, parent, false);
		convertView.setTag(this);
	}

	/**
	 * This method is the only entry point to get a BaseAdapterHelper.
	 * 
	 * @param context
	 *            The current context.
	 * @param convertView
	 *            The convertView arg passed to the getView() method.
	 * @param parent
	 *            The parent arg passed to the getView() method.
	 * @return A BaseAdapterHelper instance.
	 */
	public static BaseAdapterHelper get(Context context, View convertView,
			ViewGroup parent, int layoutId) {
		return get(context, convertView, parent, layoutId, -1);
	}

	/** This method is package private and should only be used by QuickAdapter. */
	static BaseAdapterHelper get(Context context, View convertView,
			ViewGroup parent, int layoutId, int position) {
		if (convertView == null) {
			return new BaseAdapterHelper(context, parent, layoutId, position);
		}
		return (BaseAdapterHelper) convertView.getTag();
	}

	/**
	 * This method allows you to retrieve a view and perform custom operations
	 * on it, not covered by the BaseAdapterHelper.<br/>
	 * If you think it's a common use case, please consider creating a new issue
	 * at https://github.com/JoanZapata/base-adapter-helper/issues.
	 * 
	 * @param viewId
	 *            The id of the view you want to retrieve.
	 */
	public <T extends View> T getView(int viewId) {
		return retrieveView(viewId);
	}

	/**
	 * Will set the text of a TextView.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param value
	 *            The text to put in the text view.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setText(int viewId, String value) {
		TextView view = retrieveView(viewId);
		view.setText(value);
		return this;
	}

	/**
	 * Will set the image of an ImageView from a resource id.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param imageResId
	 *            The image resource id.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setImageResource(int viewId, int imageResId) {
		ImageView view = retrieveView(viewId);
		view.setImageResource(imageResId);
		return this;
	}

	/**
	 * Will set background color of a view.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param color
	 *            A color, not a resource id.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setBackgroundColor(int viewId, int color) {
		View view = retrieveView(viewId);
		view.setBackgroundColor(color);
		return this;
	}

	/**
	 * Will set background of a view.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param backgroundRes
	 *            A resource to use as a background.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setBackgroundRes(int viewId, int backgroundRes) {
		View view = retrieveView(viewId);
		view.setBackgroundResource(backgroundRes);
		return this;
	}

	/**
	 * Will set text color of a TextView.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param textColor
	 *            The text color (not a resource id).
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setTextColor(int viewId, int textColor) {
		TextView view = retrieveView(viewId);
		view.setTextColor(textColor);
		return this;
	}

	/**
	 * Will set the image of an ImageView from a drawable.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param drawable
	 *            The image drawable.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setImageDrawable(int viewId, Drawable drawable) {
		ImageView view = retrieveView(viewId);
		view.setImageDrawable(drawable);
		return this;
	}

	/**
	 * Will download an image from a URL and put it in an ImageView.<br/>
	 * It uses Square's Picasso library to download the image asynchronously and
	 * put the result into the ImageView.<br/>
	 * Picasso manages recycling of views in a ListView.<br/>
	 * If you need more control over the Picasso settings, use
	 * {BaseAdapterHelper#setImageBuilder}.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param imageUrl
	 *            The image URL.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setImageUrl(int viewId, String imageUrl) {
		ImageView view = retrieveView(viewId);
		Picasso.with(context).load(imageUrl).into(view);
		return this;
	}

	/**
	 * Will download an image from a URL and put it in an ImageView.<br/>
	 * 
	 * @param viewId
	 *            The view id.
	 * @param requestBuilder
	 *            The Picasso request builder. (e.g.
	 *            Picasso.with(context).load(imageUrl))
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setImageBuilder(int viewId,
			RequestCreator requestBuilder) {
		ImageView view = retrieveView(viewId);
		requestBuilder.into(view);
		return this;
	}

	/**
	 * Add an action to set the image of an image view. Can be called multiple
	 * times.
	 */
	public BaseAdapterHelper setImageBitmap(int viewId, Bitmap bitmap) {
		ImageView view = retrieveView(viewId);
		view.setImageBitmap(bitmap);
		return this;
	}

	/**
	 * Add an action to set the alpha of a view. Can be called multiple times.
	 * Alpha between 0-1.
	 */
	public BaseAdapterHelper setAlpha(int viewId, float value) {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
			retrieveView(viewId).setAlpha(value);
		} else {
			// Pre-honeycomb hack to set Alpha value
			AlphaAnimation alpha = new AlphaAnimation(value, value);
			alpha.setDuration(0);
			alpha.setFillAfter(true);
			retrieveView(viewId).startAnimation(alpha);
		}
		return this;
	}

	/**
	 * Set a view visibility to VISIBLE (true) or GONE (false).
	 * 
	 * @param viewId
	 *            The view id.
	 * @param visible
	 *            True for VISIBLE, false for GONE.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setVisible(int viewId, boolean visible) {
		View view = retrieveView(viewId);
		view.setVisibility(visible ? View.VISIBLE : View.GONE);
		return this;
	}

	/**
	 * Add links into a TextView.
	 * 
	 * @param viewId
	 *            The id of the TextView to linkify.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper linkify(int viewId) {
		TextView view = retrieveView(viewId);
		Linkify.addLinks(view, Linkify.ALL);
		return this;
	}

	/** Apply the typeface to the given viewId */
	public BaseAdapterHelper setTypeface(int viewId, Typeface typeface) {
		TextView view = retrieveView(viewId);
		view.setTypeface(typeface);
		return this;
	}

	/** Apply the typeface to all the given viewIds */
	public BaseAdapterHelper setTypeface(Typeface typeface, int... viewIds) {
		for (int viewId : viewIds) {
			TextView view = retrieveView(viewId);
			view.setTypeface(typeface);
		}
		return this;
	}

	/**
	 * Sets the progress of a ProgressBar.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param progress
	 *            The progress.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setProgress(int viewId, int progress) {
		ProgressBar view = retrieveView(viewId);
		view.setProgress(progress);
		return this;
	}

	/**
	 * Sets the progress and max of a ProgressBar.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param progress
	 *            The progress.
	 * @param max
	 *            The max value of a ProgressBar.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setProgress(int viewId, int progress, int max) {
		ProgressBar view = retrieveView(viewId);
		view.setProgress(progress);
		view.setMax(max);
		return this;
	}

	/**
	 * Sets the range of a ProgressBar to 0...max.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param max
	 *            The max value of a ProgressBar.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setMax(int viewId, int max) {
		ProgressBar view = retrieveView(viewId);
		view.setMax(max);
		return this;
	}

	/**
	 * Sets the rating (the number of stars filled) of a RatingBar.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param rating
	 *            The rating.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setRating(int viewId, float rating) {
		RatingBar view = retrieveView(viewId);
		view.setRating(rating);
		return this;
	}

	/**
	 * Sets the rating (the number of stars filled) and max of a RatingBar.
	 * 
	 * @param viewId
	 *            The view id.
	 * @param rating
	 *            The rating.
	 * @param max
	 *            The range of the RatingBar to 0...max.
	 * @return The BaseAdapterHelper for chaining.
	 */
	public BaseAdapterHelper setRating(int viewId, float rating, int max) {
		RatingBar view = retrieveView(viewId);
		view.setRating(rating);
		view.setMax(max);
		return this;
	}

	/** Retrieve the convertView */
	public View getView() {
		return convertView;
	}

	/**
	 * Retrieve the overall position of the data in the list.
	 * 
	 * @throws IllegalArgumentException
	 *             If the position hasn't been set at the construction of the
	 *             this helper.
	 */
	public int getPosition() {
		if (position == -1)
			throw new IllegalStateException(
					"Use BaseAdapterHelper constructor "
							+ "with position if you need to retrieve the position.");
		return position;
	}

	@SuppressWarnings("unchecked")
	private <T extends View> T retrieveView(int viewId) {
		View view = views.get(viewId);
		if (view == null) {
			view = convertView.findViewById(viewId);
			views.put(viewId, view);
		}
		return (T) view;
	}

}
